keepalived安装文档

 

1. 安装依赖

su - root

yum -y install kernel-devel*

yum -y install openssl-*

yum -y install popt-devel

yum -y install lrzsz

yum -y install openssh-clients

1. 安装keepalived

   1. 上传

1、cd /usr/local

2、rz –y

3、选择keepalived安装文件

1. 解压

tar –zxvf keepalived-1.2.2.tar.gz

1. 重命名

mv keepalived-1.2.2 keepalived

1. 安装keepalived

1、cd keepalived

2、执行命令

./configure --prefix=/usr/local/keepalived -enable-lvs-syncd --enable-lvs --with-kernel-dir=/lib/modules/2.6.32-431.el6.x86_64/build

3、编译

make

4、安装

make install

1. 配置服务和加入开机启动

cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

mkdir -p /etc/keepalived

cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

ln -s /usr/local/keepalived/sbin/keepalived /sbin/

chkconfig keepalived on

1. 修改配置文件

1. vi /etc/keepalived/keepalived.conf
2. 详解：

global_defs {

notification_email {#指定keepalived在发生切换时需要发送email到的对象，一行一个

#acassen@firewall.loc

#failover@firewall.loc

#sysadmin@firewall.loc

}

notification_email_from Alexandre.Cassen@firewall.loc#指定发件人

#smtp_server 192.168.200.1#指定smtp服务器地址

#smtp_connect_timeout 30 #指定smtp连接超时时间

router_id LVS_DEVEL#运行keepalived机器的一个标识

}

 

vrrp_instance VI_1 {

state BACKUP#指定那个为master，那个为backup

interface eth1#设置实例绑定的网卡

virtual_router_id 51#同一实例下virtual_router_id必须相同

priority 100#定义优先级，数字越大，优先级越高,备机要小于主

    advert_int 1#MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒

    nopreempt#设置为不抢占,从启动后主不会自动切换回来, 注：这个配置只能设置在backup主机上，而且这个主机优先级要比另外一台高

 

authentication {#设置认证

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {#设置vip

192.168.56.70#虚拟IP

}

}

 

virtual_server 192.168.56.70 8080 {

delay_loop 6#健康检查时间间隔

lb_algo rr #调度算法rr|wrr|lc|wlc|lblc|sh|dh

lb_kind DR #负载均衡转发规则NAT|DR|RUN

#nat_mask 255.255.255.0 #需要验证

persistence_timeout 1#会话保持时间

protocol TCP#使用的协议

 

real_server 192.168.56.201 8080 {

weight 10 #默认为1,0为失效

SSL_GET {

url { #检查url，可以指定多个

path /

digest ff20ad2481f97b1754ef3e12ecd3a9cc #检查后的摘要信息

}

url {

path /mrtg/

digest 9b3a0c85a887a256d6939da88aabd8cd

}

connect_timeout 3#连接超时时间

nb_get_retry 3#重连次数

delay_before_retry 3#重连间隔时间

}

}

 

}

 

 

1. 按照上面步骤安装备机器

注意：备的配置文件不相同。

 

1. 两台机器启动keepalived：

service keepalived start

 

1. 验证

ip a

1. 监控

因为keepalive只能监控机器的死活，所以当软件死掉后，keepalived仍然不会切换；

所以需要写一个脚本，监控软件的死活。

运行wangsf.sh，监控软件